"Hammer and Hand make beautiful, high-end, super efficient and durable custom doors. These doors are not mass-market (hence the "custom" part) but they are much better than most custom doors available out there. The people who are in the…"
"Oh, and to eliminate the leaky "sweep" gasket at the sill, we used an outswing door (with a bumper sill) installed backwards. Note that this only works under a deep porch, since the "inside" of an outswing door will not shed…"
"As we move toward more and more renewable energy in the grid, storage will be a key issue. The biggest challenge is providing renewable energy in winter, when solar energy is lowest. Not coincidentally, that's also when heating demand is…"
In this webinar we will discuss cost‐optimized, high‐performance homes that meet the “Passive House standard” and how this can be achieved throughout California with minimal additional effort and cost. Attention will be paid to the economies of scale and construction cost reductions available in multi-family Passive House buildings.See More
You raise a good question. The concept of "free and unlimited" energy is not new, in fact it is arguable that this idea is what got us into the trouble we're in to begin with (http://en.wikipedia.org/wiki/Too_cheap_to_meter).…"
"Useful information is the Coefficient of Performance (COP) of the whole house fan vs. alternatives. The true answer is more complicated than that, since all equipment has a COP "curve" that flattens out as the delta-T between inside and…"
"Thanks for the input. The next question to ask is "how much cooling power is delivered in each case?" Whole house fans work best when the house is hot and the air is cold. Either of those things change and they work less well. I am not…"
The "large fan" is a whole house fan moving anything from 1000-4000 CFM. By comparison, the ventilation system for the T24 prototype home we modeled was 67 CFM. As you might imagine, a fan that moves 1000-4000 CFM could use a lot of…"
"I think it is important to check the energy consumption of such a large fan, even assuming it can be properly air-sealed and insulated. We are finishing up a study on 2013 Code vs. Passive House in each of California's climate zones and, while…"
"Good point, but the Passive House system is also running continuously, which would tend toward higher capture efficiency as contrasted to a situation with low vented range hood usage. While the intermittent rate may be higher, its duty cycle may be…"
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Oak Ridge National Lab has partnered with GAF to host a technology challenge on roofing systems. The challenge is part of the online crowdsourcing site, JUMP, and aims to identify innovation solutions for ensuring energy efficient and durable…
Evaporative coolers, also known as swamp coolers have become a top choice for anyone looking for an alternative cooling solution from their home or office. In the past, evap cooler technology was limited for use in large operations that have easy…